I remodeled the bathroom, careful to keep the same floor level as before the demo, but of course the floor is a little higher now and the radiator I took out doesn't align with the heat pipes. What to do? They're a quarter of an inch off. Any kind of brackets or tubes to make up for this? Pleas help, it's already cold here!
There is often enough play in the pipes to make up a fraction of an inch. I did run into a similar problem may years ago with an antique gas appliance on a slab where tile was installed that raised the floor about 3/8". My solution was to grind the legs down enough to meet the gas line. Actually I seem to remember having to take a little more than 3/8" off the six legs and using small wedges to level it properly.
If you cannot get enough play in the piping to accomplish this, you may need to cut the legs of the radiator or carve a depression into the floor to make up the difference. Never seen any type flex fitting for a radiator.
If you have never made a mistake, you haven't done much.